Add array helper for modifying key of a key value array

4dev/tests/Combined/CoreLibsCombinedArrayHandlerTest.php

@@ -1286,6 +1286,118 @@ final class CoreLibsCombinedArrayHandlerTest extends TestCase
 			)
 		);
 	}
+
+	/**
+	 * provider for arrayModifyKey
+	 *
+	 * @return array<string,array<mixed>>
+	 */
+	public function providerArrayModifyKey(): array
+	{
+		return [
+			'prefix and suffix add' => [
+				'array' => [
+					'a' => 'foo',
+					'b' => 'bar',
+					'c' => 'foobar',
+				],
+				'prefix' => 'Prefix: ',
+				'suffix' => '.suffix',
+				'expected' => [
+					'Prefix: a.suffix' => 'foo',
+					'Prefix: b.suffix' => 'bar',
+					'Prefix: c.suffix' => 'foobar',
+				],
+			],
+			'prefix add only' => [
+				'array' => [
+					'a' => 'foo',
+					'b' => 'bar',
+					'c' => 'foobar',
+				],
+				'prefix' => 'Prefix: ',
+				'suffix' => '',
+				'expected' => [
+					'Prefix: a' => 'foo',
+					'Prefix: b' => 'bar',
+					'Prefix: c' => 'foobar',
+				],
+			],
+			'suffix add only' => [
+				'array' => [
+					'a' => 'foo',
+					'b' => 'bar',
+					'c' => 'foobar',
+				],
+				'prefix' => '',
+				'suffix' => '.suffix',
+				'expected' => [
+					'a.suffix' => 'foo',
+					'b.suffix' => 'bar',
+					'c.suffix' => 'foobar',
+				],
+			],
+			'empty array' => [
+				'array' => [],
+				'prefix' => '',
+				'suffix' => '.suffix',
+				'expected' => [],
+			],
+			'no suffix or prefix' => [
+				'array' => [
+					'a' => 'foo',
+					'b' => 'bar',
+					'c' => 'foobar',
+				],
+				'prefix' => '',
+				'suffix' => '',
+				'expected' => [
+					'a' => 'foo',
+					'b' => 'bar',
+					'c' => 'foobar',
+				],
+			],
+			'integer index mixed' => [
+				'array' => [
+					'a' => 'foo',
+					'b' => 'bar',
+					3 => 'foobar',
+				],
+				'prefix' => '',
+				'suffix' => '.suffix',
+				'expected' => [
+					'a.suffix' => 'foo',
+					'b.suffix' => 'bar',
+					'3.suffix' => 'foobar',
+				],
+			]
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::arrayModifyKey
+	 * @dataProvider providerArrayModifyKey
+	 * @testdox arrayModifyKey check that key is correctly modified with $key_mod_prefix and $key_mod_suffix [$_dataName]
+	 *
+	 * @param  array<mixed>  $in_array
+	 * @param  string $key_mod_prefix
+	 * @param  string $key_mod_suffix
+	 * @param  array<mixed>  $expected
+	 * @return void
+	 */
+	public function testArrayModifyKey(
+		array $in_array,
+		string $key_mod_prefix,
+		string $key_mod_suffix,
+		array $expected
+	): void {
+		$this->assertEquals(
+			\CoreLibs\Combined\ArrayHandler::arrayModifyKey($in_array, $key_mod_prefix, $key_mod_suffix),
+			$expected
+		);
+	}
 }
 
 // __END__

www/admin/class_test.array.php

@@ -263,6 +263,8 @@ $out = array_intersect_key(
 );
 print "array intersect key: " . DgS::printAr($keys) . ": " . DgS::printAr($out) . "<br>";
 
+print "array + suffix: " . DgS::printAr(ArrayHandler::arrayModifyKey($array, key_mod_suffix:'_attached')) . "<br>";
+
 print "</body></html>";
 
 // __END__

www/lib/CoreLibs/Combined/ArrayHandler.php

@@ -551,6 +551,36 @@ class ArrayHandler
 			ARRAY_FILTER_USE_KEY
 		);
 	}
+
+	/**
+	 * Modifieds the key of an array with a prefix and/or suffix and returns it with the original value
+	 * does not change order in array
+	 *
+	 * @param  array<string|int,mixed> $in_array
+	 * @param  string                  $key_mod_prefix [default=''] key prefix string
+	 * @param  string                  $key_mod_suffix [default=''] key suffix string
+	 * @return array<string|int,mixed>
+	 */
+	public static function arrayModifyKey(
+		array $in_array,
+		string $key_mod_prefix = '',
+		string $key_mod_suffix = ''
+	): array {
+		// skip if array is empty or neither prefix or suffix are set
+		if (
+			$in_array == [] ||
+			($key_mod_prefix == '' && $key_mod_suffix == '')
+		) {
+			return $in_array;
+		}
+		return array_combine(
+			array_map(
+				fn($key) => $key_mod_prefix . $key . $key_mod_suffix,
+				array_keys($in_array)
+			),
+			array_values($in_array)
+		);
+	}
 }
 
 // __END__